Rifapentine is a rifamycin derivative antimicrobial and
has a similar profile of microbiological activity to rifampicin. The molecular
weight is 877.04.

The molecular formula is C47H64N4O12.

The chemical name for rifapentine is rifamycin,
3-[[(4-cyclopentyl-1-piperazinyl)imino]methyl]or 3-[N-(4-Cyclopentyl
-1-piperazinyl)formimidoyl] rifamycin or
5,6,9,17,19,21-hexahydroxy23-methoxy-2,4,12,16,18,20,22-heptamethyl-8-[N-(4-cyclopentyl-l-piperazinyl)-formimidoyl]2,7-(epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan-1,11(2H)-dione
21-acetate. It has the following structure:

What are the possible side effects of rifapentine (Priftin)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

What are the precautions when taking rifapentine (Priftin)?

Before taking rifapentine, tell your doctor or pharmacist if you are allergic to it; or to other rifamycins (such as rifampin); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.